24243806440 has 72 divisors (see below), whose sum is σ = 63472499910. Its totient is φ = 8309798784.

The previous prime is 24243806413. The next prime is 24243806441. The reversal of 24243806440 is 4460834242.

It can be written as a sum of positive squares in 3 ways, for example, as 23901778404 + 342028036 = 154602^2 + 18494^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 24243806440.

It is not an unprimeable number, because it can be changed into a prime (24243806441) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6891562 + ... + 6895078.

Almost surely, 2^24243806440 is an apocalyptic number.

24243806440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 24243806440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31736249955).

24243806440 is an abundant number, since it is smaller than the sum of its proper divisors (39228693470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

24243806440 is an frugal number, since it uses more digits than its factorization.

24243806440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059 (or 3531 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 24243806440 in words is "twenty-four billion, two hundred forty-three million, eight hundred six thousand, four hundred forty".